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/*******************************************************************************
* Copyright (c) 2007, 2008 Symbian Software Systems and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Andrew Ferguson (Symbian) - Initial implementation
*******************************************************************************/
package org.eclipse.cdt.internal.core.index.composite;
import org.eclipse.cdt.core.CCorePlugin;
import org.eclipse.cdt.core.dom.IName;
import org.eclipse.cdt.core.dom.ast.DOMException;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.dom.ast.IScope;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPSpecialization;
import org.eclipse.cdt.core.index.IIndexFileSet;
import org.eclipse.cdt.internal.core.dom.parser.ProblemBinding;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPCompositeBinding;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPUsingDeclaration;
import org.eclipse.cdt.internal.core.index.IIndexFragmentBinding;
import org.eclipse.cdt.internal.core.index.IIndexScope;
public abstract class CompositeScope implements IIndexScope {
/**
* The factory used for obtaining further composite bindings
*/
protected final ICompositesFactory cf;
/**
* The representative binding for this composite binding. Most cases are simple
* enough that this becomes a delegate, some need to use it as a search key over fragments,
* and some ignore it as a representative binding from each fragment is needed to meet interface
* contracts.
*/
protected final IIndexFragmentBinding rbinding;
public CompositeScope(ICompositesFactory cf, IIndexFragmentBinding rbinding) {
if(cf==null || rbinding==null)
throw new NullPointerException();
this.cf = cf;
this.rbinding = rbinding;
}
final public IScope getParent() throws DOMException {
IIndexScope rscope = (IIndexScope) rbinding.getScope();
if(rscope!=null) {
return cf.getCompositeScope(rscope);
}
return null;
}
public IName getScopeName() throws DOMException {
if(rbinding instanceof IScope)
return ((IScope) rbinding).getScopeName();
return null;
}
protected final void fail() {
throw new CompositingNotImplementedError();
}
public IBinding getRawScopeBinding() {
return rbinding;
}
/**
* For bindings that are not known statically to be index bindings, we must decide how to
* process them by run-time type. This method processes a single binding accordingly.
* @param binding
* @return
*/
protected final IBinding processUncertainBinding(IBinding binding) {
if(binding instanceof IIndexFragmentBinding) {
return cf.getCompositeBinding((IIndexFragmentBinding)binding);
} else if(binding instanceof ProblemBinding) {
return binding;
} else if(binding instanceof CPPCompositeBinding /* AST composite */) {
return new CPPCompositeBinding(
processUncertainBindings(((CPPCompositeBinding)binding).getBindings())
);
} else if(binding instanceof CPPUsingDeclaration) {
return binding;
} else if(binding == null) {
return null;
} else if(binding instanceof ICPPSpecialization) {
return binding;
}
CCorePlugin.log("CompositeFactory unsure how to process: "+binding.getClass().getName()); //$NON-NLS-1$
return binding;
}
/**
* A convenience method for processing an array of bindings with {@link CompositeScope#processUncertainBinding(IBinding)}
* Returns an empty array if the input parameter is null
* @param frgBindings
* @return a non-null IBinding[]
*/
protected final IBinding[] processUncertainBindings(IBinding[] frgBindings) {
IBinding[] result= new IBinding[frgBindings==null ? 0 : frgBindings.length];
for(int i=0; i<result.length; i++) {
result[i]= processUncertainBinding(frgBindings[i]);
}
return result;
}
public final IBinding getBinding(IASTName name, boolean resolve) throws DOMException {
return getBinding(name, resolve, IIndexFileSet.EMPTY);
}
public final IBinding[] getBindings(IASTName name, boolean resolve, boolean prefix) throws DOMException {
return getBindings(name, resolve, prefix, IIndexFileSet.EMPTY);
}
}
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